Table of Contents
This article provides a step-by-step guide on how to attach a new managed data disk to a Windows virtual machine (VM) using the Azure portal. Keep in mind that the number of data disks you can attach depends on the size of the VM.
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Add a data disk
1. Sign in to the Azure portal, select a virtual machine from the list. On the Virtual machine pane, select Disks.
2. On the Disks pane, select Create and attach a new disk.
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3. In the drop-downs for the new disk, make the selections you want, and name the disk.
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4. Select Save to create and attach the new data disk to the VM.
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Initialize a new data disk
5. Connect to the VM using remote desktop, right click on Windows Start button then select Disk Management.
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6. Disk Management recognizes that you have a new, uninitialized disk. Verify the new disk is selected and then select OK to initialize it.
![Bg726](https://bonguides-1e199.kxcdn.com/wp-content/uploads/2022/06/bg726.png)
7. The new disk appears as unallocated. Right-click anywhere on the disk and create a New volume. Proceed through the wizard, keeping all of the defaults, and when you’re done select Finish.
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8. Once done, open Windows Explorer to verify the disk was added into the VM.
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Not a reader? Watch this related video tutorial: